Glassfocus the Magazine for the Glass Industry
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As is the case carbon dioxide (CO2) emissions from the process in for all energy-intensive industries, the glass the same period. Glass technology manufacturers T industry is battling rapidly increasing energy costs. were early adopters of energy-effi ciency measures in At the same time, it is facing growing public pressure industrial production and offer innovative solutions to contribute to climate protection. These two issues that can lower operating costs effectively and pre- are the main drivers for achieving optimal utilization serve the environment – for example, new burner of energy resources in the glass industry. technologies for the hot refi nement of container glass, new fi ltration systems that can reduce the Effi cient utilization of energy water consumption of plate-glass cleaning systems by half and new insulation technology for furnaces, Although glass production is energy-intensive due to which signifi cantly improves the heat radiation. the physical processes involved, process improve- Siemens provides energy-intensive industries with ments can result in considerable savings. The fl oat services, products and systems aimed at increasing process has improved its energy effi ciency by a factor effi ciency – for example, energy audits that help re- of two since its invention 50 years ago. This improve- veal unnecessary consumption and potential savings. ment, combined with many pollution control mea- Process heat recovery systems, which utilize process 4 GlassFocus 2008 Focusing on glass production. Optimal energy and resource utilization combined with maximum marketable product yield Pictures: W. Geyer W. Pictures: heat for steam and power generation, make it possi- Quality increases effi ciency ble to generate some of the electrical power required for glass production from the waste process heat. Effi cient production means not only optimizing en- Energy management tools that are part of Totally ergy use but also increasing the product yield as well Integrated Automation help the glass industry ana- as reducing rejects and waste during the process. lyze and optimize its energy consumption. The en- Working with various technology partners, Siemens ergy-saving and variable-speed motors and drives develops solutions that make it possible to increase from Siemens contribute to this, enabling a 30 to 50 glass yield – thanks to optimal process control in the percent savings in the electrical power required for furnace, fl oat bath, and annealing lehr as well as in the drives, depending on the application. Another glass processing. Precise cutting control and optimal option is to recover kinetic energy in the drives and edge trimming with state-of-the-art motion control feed it back into the grid as electrical power. To do solutions from Siemens reduce the amount of cullet. this, Siemens has developed products such as the However, glass is not just a material that consumes Smart Line Modules and Active Line Modules of the a great deal of energy in its production. In buildings Sinamics S series. Not only can they be used to feed and cars, glass can also help conserve energy. In the power back into the grid, but they also enable equip- summer, coated glass protects building interiors ment and units to share and exchange drive energy from solar heat, thereby reducing the load on air- from different motors, thereby reducing the burden conditioning systems. High-quality insulating win- on the power supply. As a result, the connected load dow systems with new, slender frame profi les and of IS machines in hollow glass, for example, can be triple insulation glass or vacuum glass can consider- reduced by almost 70 percent. In addition, the power ably reduce window heat loss during the cold season, consumption of the machine is reduced by almost 50 thereby reducing heating costs. These are just two percent. examples of glass innovations that have opened up GlassFocus 2008 5 (MBTTGPSUIF BVUPNPUJWFJOEVTUSZ "TUIFHMBTTTVSGBDFTJO WFIJDMFTJODSFBTF TPEP UIFEFNBOETQMBDFEPO HMBTTDIBSBDUFSJTUJDT DPNQMFUFMZ OFX NBSLFU PQQPSUVOJUJFT $PBUFE BOE BOEUFTUNPEFT BTTBGFUZ[POFTOPXDBODPOUJOVFUP MBNJOBUFEHMBTTXJMMQMBZBOFWFSHSFBUFSSPMFJOTVDI PQFSBUFJOBSFEVDFETQFFENPEFBOEOFFEOPUCFEJT JOOPWBUJPOT BT UIFTF UZQFT PG HMBTT DBO CF NBEF DPOOFDUFE5IFUZQFUFTUXBTDBSSJFEPVUCZUIF#FSVGT UPVHIFSPSHJWFOTQFDJBMPQUJDBMPSNFDIBOJDBMQSPQ HFOPTTFOTDIBGUMJDIF *OTUJUVU GÔS "SCFJUTTJDIFSIFJU FSUJFT*OUIJTTFDUPS BVUPNPUJWFHMBTTJTTUJMMPOFPG (FSNBO SFHVMBUPSZ CPEZ BOE CZ UIF 5´7 "OPUIFS UIFNBKPSTPVSDFTPGJOOPWBUJPO"VUPNPUJWFEFTJHO JOOPWBUJPO UIBU QSPWJEFT JODSFBTFE FGÙDJFODZ JT UIF USFOETQPJOUUPTUJMMHSFBUFSVTBHFPGHMBTTJOUIFGVUVSF FYUFOTJWF 4JNPUJPO 5PQ -PBEJOH MJCSBSZ XIJDI GBDJMJ CFDBVTFUIFHMBTTTVSGBDFTJOWFIJDMFTBSFDPOTUBOUMZ UBUFTUIFFGÙDJFOUJNQMFNFOUBUJPOPGIBOEMJOHUBTLTJO